Flat knitting frame



July 26, 1938. R. N EBICH V FLAT' KNITTING FRAME Fiied Dec. 2, 1937 INVENTOR Ruo/ NEE/CH BY I Wk ATTORNEYS Patented July 26, 1938 Y UNITED STATES FLAT KNITTING FRAME Rudi Nebich, Chemnltz, Germany Application December 2, 1937, Serial No. 177,705 In Germany December 7, 1936 2 Claims. (oi. 66--91) This invention relates to flat knitting frames.

In fiat knitting frames having dividing sinkers for producing plush goods it is known to provide both the jack and dividing sinkers serving, re-

5 spectively, for sinking and dividing the plush thread with plush nibs. The plush thread as well as the ground thread are thus sunk in horizontal direction, 1. e. forwardly, and divided in the same manner, though the plush thread is divided only part1y,.as full dividing of the plush thread would require taking back the jack sinkers to such an extent that the dividing sinkers would receive half of the sunk plush thread loops. This would, however, cause release of the ground thread loops by the jack sinkers during dividing and unavoidably lead to operating troubles. In the known fiat knitting frames of this class this is prevented by dividing the plush thread only partly in forward direction and completing the dividing of the plush thread loops by the needles going into pressing position and by a rising upper edge of the plush nib of the dividing sinkers.

In these known machines dividing of the plush loops is therefore the result of a threefold action. Partial dividing of the plush loops by the descending needles is effected in such manner that the plush loops hanging on the plush nibs of the dividing sinkers and having 30 been divided only partly, say, one-third are subsequently drawn out while the plush loops of the jack sinkers give oif sumcient thread. This drawing out operation requires of course that the dividing sinkers during drawing out of the 35 plush loops remain for some time in a position at which they can hold the plush loops hanging on their plush nibs. If the plush loops were released by the nibs during this operation, they could not be drawn out for lack of resistance.

40 Whilst normally the dividing sinkers after division and the jack sinkers are taken back in one operation it is necessary to keep the dividing sinkers in this instance in a front position, at least temporarily, which involves a considerable prolongation of the dividing process and thereby also of the time required for producing a course, so that a machine of this type is less economical.

A contributing factor is of course the dividing of the plush loops by the ascending edge of the 50 plush nib of the dividing sinkers.

It is further known to divide the plush loops in flat knitting frames of this class solely by means of the needles passing into pressing position. The dividing sinkers have then no plush 55 nib at all or one that does not project to any considerable extent. In the latter case the plush nib exclusively serves for holding the plush loops during the drawing out operation. In dividing sinkers having no special plush nib this function is executed by the upper edge thereof which 5 for this purpose is arranged on a correspondingly low level. In these two known machine types the dividing process is of course delayed compared with an ordinary machine, since the dividing sinkers during drawing out of the plush loops it) must remain in a front position as described instead ofbeing immediately withdrawn in the usual manner; i It is the object of the invention to eliminate these drawbacks by dividing the plush loops i5 solely by the dividing sinkers and correspondingly withdrawing the jack sinkers during division, whilst the'ground thread loops released by the jack sinkers are held on'the stem of the needles by auxiliary sinkers which are guided in the sinker head or'bar near the jack sinkers independently of the latter and their motion and during motion of the jack sinkers into dividing position move forward, the upper'part of said auxiliary sinkers being so short that they cannot 2 grasp the plush loops.

In this manner itv becomes possible to divide also the plush threads in one operation exactly as in ordinary machines.

It has been proposed already to divide the plush threads solely by means of sinkers having a prominently projecting plush nib so as to carry out the dividing process in one operation. In machines of this type the sinking of the plush thread, however, is not eifected by the usual jack sinkers provided with a plush nib but by special jack sinkers. Each sinking point in such a machine is provided with a jack sinker for the ground thread and a jack sinker for the plush thread. Both jack sinkers must of course be 40 independent of one another as to their motions during sinking and dividing, because their paths diifer in size. The result is that the second jack sinker of each sinking point requires special driving means, whilst the auxiliary sinkers in a machine according to the invention can be actuated by the usual facing bar.

By way of example, the invention is illustrated in the accompanying drawing, in which Figure 1 shows the sinking position of a sinker; Fig. 2, the dividing position; Fig. 3, a dividing sinker; and Fig. 4, the arrangement of the sinkers seen from the front.

The ground thread 3 and the plush thread 4 are sunk at each sinking point by a single jack sinker in known manner. The jack sinkers I are for this purpose provided with a plush nib projecting to such an extent that during'dividing they can correspondingly give off plush thread 4 to the dividing sinkers 5 so as to enable the sinkers 5 also provided with a plush nib 1 to form a plush loop. For example, the jack sinkers I are for this purpose during dividing taken back to the extent oi. one-half of the plush thread sinking distance, so that the sun]: ground thread loops are released by the jack sinkers I and the ground thread throats thereof may even pass behind the needles II, as shown in Fig. 2. However, as the ground thread loops must be held in position on theshanks of the needles II, one auxiliary sinker 2 is associated with each jack sinker I. The auxiliary sinkers 2. are guided in the sinker head or bar closely adjacent to the jack sinkers I, preferably in the cut of their associated sinkers I. The auxiliary sinkers 2 are further independent as to motion from the sinkers I. While the latter are taken back into dividing position the auxiliary sinkers 2 are advanced far enough to act for the sinkers I and hold the ground thread loops onto the stem of the needles II. This motion is imparted to the auxiliary sinkers 2 by the usual facing'bar III during its forward motion to push the dividing sinkers into dividing position. The auxiliary sinkers 2 are simply taken along. When the jack sinkers I and the dividing sinkers 5 are moved back in the usual manner by the facing bar I0 for the pressing and knocking over operations, the bar III takes back also the auxiliary sinkers 2.

In order to be able to guide one jack sinker I and one auxiliary sinker 2 in a slot of the sinker head the sinkers I are provided only on one side with a fitting member II, as shown in If the jack sinkers I are driven by jacks the latter should be prevented from acting on the auxiliary sinkers 2. This can be prevented in a very simple manner by providing the auxiliary sinkers with a tail member in the same way as is done with the dividing sinkers of fine gage machines.

I claim:

1. A flat knitting frame, comprising dividing sinkers for producing plush goods in which a plush loop is arranged above every sinker loop and the sinking of the plush thread is effected by a jack sinker having a correspondingly projecting plush nib and the dividing sinkers also have a plush nib, the dividing of the plush thread loops being solely carried out by the dividing sinkers while the jack sinkers are correspondingly withdrawn during dividing, and auxiliary sinkers for holding the ground thread loops released by the jack sinkers on the stem of the needles, said auxiliary sinkers being guided in the sinker head near the jack sinkers independently of the motion of the latter and during motion of the jack sinkers into dividing position being moved forward, the upper part of said auxiliary sinkers being so short that they cannot grasp the plush loops.

2. A flat knitting frame according to claim 1, wherein the auxiliary sinkers during dividing are advanced by the facing bar.

RUDI NEBICH. 

